Sean C. O'Brien, PA
- Medicare patients, 2024
- 153
- Part D claims, 2024
- 377
- Hospital affiliations
- 4
- Industry payments
- $56
- Medical groups
- 2
- Practice address
- 289 County Road, Windsor, VT 05089
- Practice phone
- Call (802) 674-6711
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Sean O'Brien's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Sean C. O'Brien is a physician assistant in Windsor, Vermont
Sean O'Brien practices at Mount Ascutney Hospital and Health Center in Windsor, Vermont, part of Dartmouth-Hitchcock Health.
Sean O'Brien's NPI, 1508126681, was assigned on May 22, 2012. Sean O'Brien holds Vermont license 055.0031197.
- NPI
- 1508126681NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6507187994
- NPI enumeration date
- May 22, 2012
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (802) 674-6711
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Sean C. O'Brien practices at Mount Ascutney Hospital and Health Center in Windsor, Vermont
Sean O'Brien's primary practice is Mount Ascutney Hospital and Health Center, at 289 County Road, Windsor, VT 05089 in Windsor County. The practice phone is (802) 674-6711.
- Mount Ascutney Hospital and Health Center289 County Road, Windsor, VT 05089 · Windsor CountyPhone(802) 674-6711
Source: Dmand AI Affiliation Data
Sean C. O'Brien is affiliated with 4 sites of care and 2 medical groups
Sean O'Brien's primary practice is Mount Ascutney Hospital and Health Center in Windsor, Vermont, part of Dartmouth-Hitchcock Health. Sean O'Brien is also affiliated with Mt. Ascutney Hospital and Health Center. The medical group on file is Mt. Ascutney Hospital and Health Center. Dmand AI also links Sean O'Brien to 2 more hospitals and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Sean C. O'Brien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Sean O'Brien practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mount Ascutney Hospital and Health Center | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Sean C. O'Brien is one of 313 physician assistants in Vermont
Physician assistant is Sean O'Brien's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Dmand AI has Sean O'Brien's licenses on file in 2 states: Vermont and New Hampshire.
Specialties and state licenses
- Physician assistant, VermontPrimary
- Medical physician assistant, New Hampshire
Physician assistants near Sean O'Brien
Counts of physician assistants with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Sean C. O'Brien treated 153 Medicare patients in 2024, average age 80
CMS counts 153 Medicare patients who saw Sean O'Brien in 2024. The largest group is 85 and over, with 56 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 22% are also on Medicaid. Their average risk score is 1.80, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Sean O'Brien's median patient age at 62, with 54% women.
Sean O'Brien's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Sean O'Brien's Medicare patients by sex, 2024
- Women8757%
- Men6643%
Chronic conditions among Sean O'Brien's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis61%
- Atrial fibrillation51%
- Heart failure49%
- Ischemic heart disease48%
- Mood disorders41%
- Diabetes40%
Share of Medicare patients with each condition. A patient can have several.
Sean O'Brien's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women54%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Sean C. O'Brien wrote 377 Medicare Part D claims in 2024
In 2024, Sean O'Brien wrote 377 Medicare Part D claims for 144 patients. 81% of them were for generic drugs.
Sean O'Brien's Part D claims by kind of drug, 2024
- Generic307 claims81%
- Brand-name and other70 claims19%
Drug classes CMS tracks in Sean O'Brien's Part D claims, 2024
- Opioids6%24 of 377 claims
- Antibiotics9%33 of 377 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Sean C. O'Brien takes part in Medicare
Sean O'Brien accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Sean C. O'Brien received $56 in industry payments in 2025
CMS Open Payments shows 1 general payment to Sean O'Brien from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Edwards Lifesciences Corporation paid the most, $56.
Companies that paid Sean O'Brien the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Sean C. O'Brien's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Sean C. O'Brien
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Sean C. O'Brien's NPI number?
Sean C. O'Brien's NPI number is 1508126681. It was assigned on May 22, 2012, and it is active in the NPI Registry.
What does Sean C. O'Brien specialize in?
Sean C. O'Brien is a physician assistant in Windsor, Vermont. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Sean C. O'Brien practice?
Sean O'Brien practices at 289 County Road, Windsor, VT 05089. Sean O'Brien's primary practice is Mount Ascutney Hospital and Health Center in Windsor, Vermont, part of Dartmouth-Hitchcock Health. Dmand AI also links Sean O'Brien to 2 hospitals and 1 medical group.
What is Sean C. O'Brien's office phone number?
The practice phone on file for Sean O'Brien is (802) 674-6711.
What is Sean C. O'Brien's medical license number?
Sean O'Brien holds Vermont license 055.0031197, one of the licenses on file in 2 states.
Which states has Sean C. O'Brien been licensed in?
Dmand AI has state licenses on file for Sean O'Brien in Vermont and New Hampshire.
Which hospitals is Sean C. O'Brien affiliated with?
Sean O'Brien practices at Mount Ascutney Hospital and Health Center in Windsor, Vermont. Sean O'Brien is also affiliated with Mt. Ascutney Hospital and Health Center. Dmand AI links Sean O'Brien to 2 more hospitals.
What medical group is Sean C. O'Brien part of?
Sean O'Brien is linked to Mt. Ascutney Hospital and Health Center. Dmand AI links Sean O'Brien to 1 more medical group.
Does Sean C. O'Brien accept Medicare?
Yes. CMS lists Sean O'Brien as accepting Medicare assignment.
How many Medicare patients does Sean C. O'Brien see?
CMS counts 153 Medicare patients who saw Sean O'Brien in 2024, with an average age of 80.
Has Sean C. O'Brien received payments from drug or device companies?
CMS Open Payments shows $56 in general payments to Sean O'Brien from 1 company from 2025 to 2025. The largest total came from Edwards Lifesciences Corporation.
How long has Sean C. O'Brien been practicing?
Sean O'Brien graduated from medical school in 2012, 14 years ago.
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